HP Xw8200 - Workstation - 1 GB RAM Technical Reference Manual page 57

Master Boot Record Security
The MBR contains information needed to successfully boot from a disk and to access the data stored on
the disk. Master Boot Record Security detects and reports unintentional or malicious changes to the
MBR, such as those caused by some workstation viruses or by the incorrect use of certain disk utilities. It
also allows you to recover the "last known good" MBR, should changes to the MBR be detected when
the system is restarted.
To enable MBR Security:
1 Turn on or restart the workstation. If you are in Windows, click Start>Shut Down>Restart.
2 As soon as the workstation is turned on, press and hold the F10 key until you enter Computer Setup.
Press Enter to bypass the title screen, if necessary.
NOTE If you do not press the F10 key at the appropriate time, you must restart the workstation and
press and hold the F10 key again to access the utility.
If you are using a PS/2 keyboard, you may see a Keyboard Error message—disregard it.
3 Select Security>Master Boot Record Security>Enabled.
4 Select Security>Save Master Boot Record.
5 Before exiting, click File>Save Changes and Exit.
When MBR Security is enabled, the BIOS prevents any changes being made to the MBR of the current
bootable disk while in MS-DOS or Windows Safe Mode.
NOTE Most operating systems control access to the MBR of the current bootable disk; the BIOS cannot
prevent changes that might occur while the operating system is running.
Each time the workstation is turned on or restarted, the BIOS compares the MBR of the current bootable
disk to the previously saved MBR. If changes are detected and if the current bootable disk is the same
disk from which the MBR was previously saved, the following message is displayed:
1999 - Master Boot Record has changed.
Press any key to enter Setup to configure MBR Security.
Upon entering Computer Setup, you must perform one of the following tasks:
Save the MBR of the current bootable disk
Restore the previously saved MBR
Disable the MBR Security feature
You must know the setup password, if one exists.
If changes are detected and if the current bootable disk is not the same disk from which the MBR was
previously saved, the following message is displayed:
2000 - Master Boot Record Hard Drive has changed.
Press any key to enter Setup to configure MBR Security.
Upon entering Computer Setup, you must perform one of the following tasks:
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